多項(xiàng)選擇題Which three statements are true about Source Specific Multicast？（）

A.Is best suited for applications that are in the one-to-many category.
B.SSM uses shortest path trees only.
C.The use of SSM is recommended when there are many sources and it is desirable to keep the amount of mroute state in the routers in the network to a.
D.There are no RPs to worry about.


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3.多項(xiàng)選擇題For the following LMI types，which three can be configured for use with Frame Relay on a Cisco router？（）

A.Cisco
B.ANSI - Annex D
C.Q.931 - Annex B
D.Q.933 - Annex A

5.單項(xiàng)選擇題You work as a network engineer for the company，you want to configure two BGP speakers to form an EBGP session across a firewall. On the engineer’s network，the firewall always permits TCP sessions that are initiated from the inside network （the network attached to the inside interface of the firewall）. What prerequisite is there for enabling BGP to run on this network？（）

A.EBGP multihop will need to be configured for this to work.
B.This should work with normal BGP peering，with no additional configuration on the BGP speakers or the firewall.
C.The BGP protocol port must be opened on the firewall
D.There is no way to make BGP work across a firewall.

7.單項(xiàng)選擇題Multi Protocol Label Switching （MPLS） is a data-carrying mechanism that belongs to the family of packet-switched networks. For an MPLS label，if the stack bit is set to1，which option is true？（）

A.The stack bit will only be used when LDP is the label distribution protocol
B.The label is the last entry in the label stack.
C.The stack bit is for Cisco implementations exclusively and will only be used when TDP is the label distribution protocol.
D.The stack bit is reserved for future use.